util.c

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Written By Julian ELischer
 * Copyright julian Elischer 1993.
 * Permission is granted to use or redistribute this file in any way as long
 * as this notice remains. Julian Elischer does not guarantee that this file
 * is totally correct for any given task and users of this file must
 * accept responsibility for any damage that occurs from the application of this
 * file.
 *
 * ([email protected] [email protected])
 *
 * User SCSI hooks added by Peter Dufault:
 *
 * Copyright (c) 1994 HD Associates
 * (contact: [email protected])
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of HD Associates
 *    may not be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL HD ASSOCIATES BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
/*
 * Taken from the original scsi(8) program.
 * from: scsi.c,v 1.17 1998/01/12 07:57:57 charnier Exp $";
 */
#include <sys/cdefs.h>
#include <sys/stdint.h>
#include <sys/types.h>

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include <camlib.h>
#include "camcontrol.h"

int verbose;

/* iget: Integer argument callback
 */
int
iget(void *hook, char *name)
{
	struct get_hook *h = (struct get_hook *)hook;
	int arg;

	if (h->got >= h->argc)
	{
		fprintf(stderr, "Expecting an integer argument.\n");
		usage(0);
		exit(1);
	}
	arg = strtol(h->argv[h->got], 0, 0);
	h->got++;

	if (verbose && name && *name)
		printf("%s: %d\n", name, arg);

	return arg;
}

/* cget: char * argument callback
 */
char *
cget(void *hook, char *name)
{
	struct get_hook *h = (struct get_hook *)hook;
	char *arg;

	if (h->got >= h->argc)
	{
		fprintf(stderr, "Expecting a character pointer argument.\n");
		usage(0);
		exit(1);
	}
	arg = h->argv[h->got];
	h->got++;

	if (verbose && name)
		printf("cget: %s: %s", name, arg);

	return arg;
}

/* arg_put: "put argument" callback
 */
void
arg_put(void *hook __unused, int letter, void *arg, int count, char *name)
{
	if (verbose && name && *name)
		printf("%s:  ", name);

	switch(letter)
	{
		case 'i':
		case 'b':
		printf("%jd ", (intmax_t)(intptr_t)arg);
		break;

		case 'c':
		case 'z':
		{
			char *p;

			p = calloc(1, count + 1);
			if (p == NULL) {
				fprintf(stderr, "can't malloc memory for p\n");
				exit(1);
			}

			strlcpy(p, (char *)arg, count + 1);
			if (letter == 'z')
			{
				int i;
				for (i = count - 1; i >= 0; i--)
					if (p[i] == ' ')
						p[i] = 0;
					else
						break;
			}
			printf("%s ", p);

			free(p);
		}

		break;

		default:
		printf("Unknown format letter: '%c'\n", letter);
	}
	if (verbose)
		putchar('\n');
}

/*
 * Get confirmation from user
 * Return values:
 *    1: confirmed
 *    0: unconfirmed
 */
int
get_confirmation(void)
{
	char str[1024];
	int response = -1;

	do {
		fprintf(stdout, "Are you SURE you want to do this? (yes/no) ");
		if (fgets(str, sizeof(str), stdin) != NULL) {
			if (strncasecmp(str, "yes", 3) == 0)
				response = 1;
			else if (strncasecmp(str, "no", 2) == 0)
				response = 0;
			else
				fprintf(stdout,
				    "Please answer \"yes\" or \"no\"\n");
		} else
			response = 0;
	} while (response == -1);
	return (response);
}